using System;
using System.Collections.Generic;
using Avalonia.Controls;
using Avalonia.Controls.Templates;
using DailyPoetryA.Library.ViewModels;

namespace DailyPoetryA;

public class ViewLocator : IDataTemplate {
    private Dictionary<Type, Control> _cache = new();

    public Control Build(object data) {
        if (data is null)
            return null;

        var name = data.GetType().FullName!
            .Replace("ViewModel", "View", StringComparison.Ordinal)
            .Replace("DailyPoetryA.Library.", "DailyPoetryA.");
        var type = Type.GetType(name);

        if (type == null) {
            return new TextBlock { Text = "Not Found: " + name };
        }

        var control = _cache.TryGetValue(type, out var value)
            ? value
            : _cache[type] = (Control)Activator.CreateInstance(type)!;
        control.DataContext = data;
        return control;
    }

    public bool Match(object data) {
        return data is ViewModelBase;
    }
}